Glass, Volume 1Minoru Tomozawa, Robert H. Doremus |
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Page 42
... silicates and at 0.654 μm ( ɛ = 19.07 ) in potassium silicates . Nath et al . ( 1965 ) have determined that Cr6 + produces two ultraviolet absorption bands in sodium silicate glasses at 0.37 μm ( ε 4200 ) and at 0.27 μm as shown earlier ...
... silicates and at 0.654 μm ( ɛ = 19.07 ) in potassium silicates . Nath et al . ( 1965 ) have determined that Cr6 + produces two ultraviolet absorption bands in sodium silicate glasses at 0.37 μm ( ε 4200 ) and at 0.27 μm as shown earlier ...
Page 43
... silicate glasses melted under reducing conditions . Four absorption bands were observed near 0.50 , 0.59 , 0.73 , and 1.0 μm . It was concluded that Cr2 + was present in a high - spin distorted octahedral site . d . Managanese ...
... silicate glasses melted under reducing conditions . Four absorption bands were observed near 0.50 , 0.59 , 0.73 , and 1.0 μm . It was concluded that Cr2 + was present in a high - spin distorted octahedral site . d . Managanese ...
Page 239
... silicate glasses and is dominant in glasses with high alkali content . The ESR response of this center is shown in Fig . 10 for potassium and sodium silicate glasses . Schreurs ( 1967 ) has suggested that this center is due to a hole ...
... silicate glasses and is dominant in glasses with high alkali content . The ESR response of this center is shown in Fig . 10 for potassium and sodium silicate glasses . Schreurs ( 1967 ) has suggested that this center is due to a hole ...
Contents
Text | 8 |
Ultraviolet Absorption | 10 |
Visible Absorption | 35 |
Copyright | |
49 other sections not shown
Common terms and phrases
absorption alkali anisotropic annealing applications assumed atoms band birefringence bleaching bond Bray Brillouin calculations caused Ceram charge Chem coefficient color composition concentration considered constant containing coordination copper crystal crystalline curve darkening density dependence described detailed determined dielectric diffusion discussed distribution effect electron energy equilibrium et al experimental fading field Figure fluctuations frequency function given gives heat heat treatment hole increase indicated intensity ions levels light liquid material measured microstructural mole negative birefringence observed obtained optical oxide oxygen particles phase photochromic Phys polarization positive present produce range ratio reduced relaxation reported respectively sample scattering separation shift shown in Fig shows silicate glasses silver halide similar SiO2 sodium Solids spectra spectrum strain stress stretching structural studied Taylor techniques temperature term thermal tion transition trapped viscosity wavelengths York